Java Reference
In-Depth Information
How it works...
The lengthy (yet abbreviated) code segment shows you how to implement a custom control
class. This is done by extending the
Control
class from which our control will inherit several
properties and behaviors. For our
Deck
control, let's explore how it works.
F
Defining the control
—the
Deck
class extends the
Control
class, which extends
CustomNode
. As a matter of fact, creating a custom control works in the same way
as creating a custom node; you need
override function create():Node
to
return the control you want to create. In our code example, we return an instance of
Group
as the container for our
Deck
class.
F
Class properties
—all public variables declared in the class definitions will be
treated as class properties. Our custom Deck control will expose the following
self-explanatory properties:
roundCornerSize:Integer;
borderSize:Integer = 2;
borderColor:Color;
slideOffset:Integer=20;
duration:Duration = 300ms;
enableReflection:Boolean
The class
Deck
will also inherit properties from the base class
Control
.
F
The
Deck.add()
function
—the
Deck
class exposes the
Deck.add(node:Node)
function to add items to the stack (internally managed by an instance of
Group
assigned to variable
stack
). The function wraps the added node in a virtual card
for the deck by calling
createCard()
which basically returns a Group instance
containing the added node and a
Rectangle
instance as a background. The card
is then added to the content sequence of the deck's internal
stack
.
